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JAMES G.' BUTTERWORTH, OF PROVIDENCE, RHODE ISLAND.

SASI-I-FASTENER.

Specification of Letters Patent No.` 32,043, dated April 16, 1861.

To all whom it may concern:

Be it known that -I, JAMES C. BUTTER- woRrH, of Providence, in thecounty of Providence, in the State of Rhode Island, have invented a newand Improved Vindow- Sash Fastener; and I do hereby declare that thefollowing is a full and correct description thereof, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, the same letters in all the figures denoting the same parts.

In these drawings, Figure 1, is a perspective view of the fastener. Fig.2, is a section taken through the center of the same, across the shaftof the cam and showing parts of the sash and frame. Fig. 3, is arepresentation of the shaft and lever detached from the cam. Fig. l,shows the face of the cam.

To construct my improved sash fastener, make the plate A, with twoprojections or standards E, E, at or near one end, and with a recessthrough the plate between them; a hole is made in each of the standardsat T, to receive the pivot or shaft of the cam B, which is placedbetween the standards E, E, and which also projects through the recessin plate. At the other end ofthis plate, upon the back of it, a springC, is attached, which extends up' on the back of the plate far enough toallow its free end to rest upon the under side of the cam B. There isanother recess P, through the plate A, a litt-le below the one betweenthe standards, to allow the stud N, which is attached to the spring O,to project through.v

S, 5, are holes at each end of the plate for lie pupose of fastening itto the sash. (See 4inf. 2

Ihe face of the cam B, or that part of it that projects through theplateA, is recessed as seen in Figs. 2, and 4, O,to receive a piece ofrubber packing or other semi-elastic material, which projects a littleabove the face of the cam; the objectof which is to prevent the metalcam from wearing a place in the window frame L, and to insure sufficientfriction on the cam to sustain the sash when raised; this rubber orsubstance used in the recess of the cam is subjected to a great strainwhile the sash is being supported, this strain tending to rub it fromits place which makes it very difficult to hold it upon the cam. Toobviatethis difficulty, I make the bottom of the recess in the face ofthe cam, full of small points projecting outward7 either by making theproper points in the core` that forms the recess at the time of castingthe cam, or in some other suitable way;- these points enter the rubberwhen it is subjected to the strain before mentioned, and prevent it frommoving from its place; the greater the weight to be sustained. thedeeper the points will enter the rubber, and the more firmly it will beheld in place. The bottom of the recess in the cam may be made full ofcreases, or corrugated, for the saine purpose but does not answer aswell.

The lever and shaft D, of the cam B, are secured to it by having a screwthread cut. upon the shaft and a corresponding thread in the hole in thecam; this is to admit of the lever and shaft being easily removed, whichmay be done by turning the lever around in the opposite way to that bywhich the cam is operated. When this lever is removed the sash will besecurely locked against being opened from the outside by breaking theglass and operating the fastener, as is frequently done with theordinary fasteners; and it will also prevent the sash from being raised(or lowered) by children andv others on the inside, at improper times.

The operation of the fastener is as follows. When it is desired to raisethe sash, the lever V, is raised which turns the cani B, back, andpresses the spring O, back also, withdrawing the stud N, from the recessJ, in the window frame; when the sash will be free to move; when thesash is required to be held at any particular height, the lever V, isreleased, when the spring O, will push the cam B, outward, and cause itto press against the window frame, and the friction of the rubber pad onthe face of the cam, against the frame, causes the4 cam to turn outfarther as the sash inclines to descend, until it presses the sash sohard against the window frame on the opposite side, as to createfriction enough there to` projects far. enough to prevent the stud N, asdescribed, with the plate, and springs from touching the Window frame.for the purposes herein set forth. v j, Having thus described myimproved sash 4 fastener, What I claim as my invention and JAMES C'BUTTERWORTH' 5 desire to secure by Letters Patent is: Witnesses:

-The combination of the cam, recessed and THOMAS C. GREENE,furnishedvvith the ricton pad substantially BENJAMIN ARNOLD. A

